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Remove kallsyms_lookup_name() wrapper

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After the removable of get_vmalloc_info(), the unused global memory
variables, and the optional dcache/icache shrinkers there is no
longer a need for the kallsyms compatibility code.  This allows
us to eliminate another brittle area of the code by removing the
kernel upcall this functionality depended on for older kernels.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2014-10-01 19:58:11 -04:00
parent 89a461e70c
commit 44778f4110
6 changed files with 1 additions and 209 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/spl-build.m4
-41
View File
@@ -28,7 +28,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_PDE_DATA
SPL_AC_MUTEX_OWNER
SPL_AC_MUTEX_OWNER_TASK_STRUCT
SPL_AC_KALLSYMS_LOOKUP_NAME
SPL_AC_USER_PATH_DIR
SPL_AC_SET_FS_PWD
SPL_AC_SET_FS_PWD_WITH_CONST
@@ -47,7 +46,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_EXPORTED_RWSEM_IS_LOCKED
SPL_AC_KERNEL_FALLOCATE
SPL_AC_KERN_PATH
SPL_AC_CONFIG_KALLSYMS
SPL_AC_CONFIG_ZLIB_INFLATE
SPL_AC_CONFIG_ZLIB_DEFLATE
SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
@@ -957,25 +955,6 @@ AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 2.6.18 API change,
dnl # kallsyms_lookup_name no longer exported
dnl #
AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME],
[AC_MSG_CHECKING([whether kallsyms_lookup_name() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/kallsyms.h>
], [
kallsyms_lookup_name(NULL);
], [kallsyms_lookup_name], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
[kallsyms_lookup_name() is available])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.10 API change,
dnl # PDE is replaced by PDE_DATA
@@ -1501,26 +1480,6 @@ AC_DEFUN([SPL_AC_KERN_PATH],
])
])
dnl #
dnl # /proc/kallsyms support,
dnl # Verify the kernel has CONFIG_KALLSYMS support enabled.
dnl #
AC_DEFUN([SPL_AC_CONFIG_KALLSYMS], [
AC_MSG_CHECKING([whether CONFIG_KALLSYMS is defined])
SPL_LINUX_TRY_COMPILE([
#if !defined(CONFIG_KALLSYMS)
#error CONFIG_KALLSYMS not defined
#endif
],[ ],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required kallsyms support.
*** Rebuild the kernel with CONFIG_KALLSYMS=y set.])
])
])
dnl #
dnl # zlib inflate compat,
dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.